extraclasspath not working for embedded Jetty6

Description

I am trying to use Jetty6 as my embedded container for running integration tests with Ant 1.7. Cargo does not seem to recognize the jar files in <extraclasspath> element in cargo Ant task. The jar files are: servlet-api and jsp-api. The only way I can get them to be recognized is by putting them in $HOME/.ant/lib directory, which is an overkill.

This is my extra classpath:<extraclasspath><fileset dir="c:/jars"/></extraclasspath>

II've been playing with many possible path configuration including specifying jars individually as<pathelement location="..."/> (inside extraclasspath).